OurBigBook automatically adds a table of contents at the end of the first non-toplevel header of every document.
For example, on a standard document with a single toplevel header:the ToC is rendered something like:
= Animal Animals are cute! == Dog == Cat
= Animal Animals are cute! Table of Contents * Dog * Cat == Dog == Cat
The ToC ignores the toplevel header if you have one.
For when you want a quick outline of the header tree on the terminal, also consider the